Granted Patent
Utility
US 6,524,413 · App. 09/635,017
Preservation mat board
Inventors:
Martin E. Dowzall, David Wellings Pointon
Patented Case
View Patent ↗
Granted: Feb 25, 2003
Filed: Aug 9, 2000
Inventors
Martin E. Dowzall
David Wellings Pointon
Assignee (at issue)
Nielsen & Bainbridge, LLC.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.